Periodic Table


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Periodic Table

  1. 1. Mendeleev<br />Dmitri Mendeleev, 1836-1907<br />Arranged elements by chemical properties<br />Left space for elements unknown at the time<br />Predicted detailed properties for elements as yet unknown<br />Sc, Ga, Ge<br />By 1886, all these elements had been discovered, and with properties similar to those he predicted<br />
  2. 2. oups<br />
  3. 3. Properties of Metals<br />Metals are good conductors of heat and electricity.<br />Metals are shiny.<br />Metals are ductile (can be stretched into thin wires).<br />Metals are malleable (can be pounded into thin sheets).<br />A chemical property of metal is its reaction with water which results in corrosion.<br />
  4. 4. Properties of Non-Metals<br />Non-metals are poor conductors of heat and electricity.<br />Non-metals are not ductile or malleable.<br />Solid non-metals are brittle and break easily.<br />They are dull.<br />Many non-metals are gases.<br />Sulfur<br />
  5. 5. Properties of Metalloids<br />Metalloids (metal-like) have properties of both metals and non-metals.<br />They are solids that can be shiny or dull.<br />They conduct heat and electricity better than non-metals but not as well as metals.<br />They are ductile and malleable.<br />Silicon<br />
  6. 6. Periods and Groups<br />Horizontal rows are periods<br />First period is H and He<br />Second period is Li-Ne<br />Third Period is Na-Ar<br />Vertical columns are groups<br />IUPAC convention: use numbers 1-18<br />
  7. 7. Alkali Metals<br />The alkali family is found in the first column of the periodic table.<br />Atoms of the alkali metals have a single electron in their outermost level, in other words, 1 valence electron.<br />They are shiny, have the consistency of clay, and are easily cut with a knife.<br />
  8. 8. Alkaline Earth Metals<br />They are never found uncombined in nature.<br />They have two valence electrons.<br />Alkaline earth metals include magnesium and calcium, among others.<br />
  9. 9. Transition Metals<br />Transition Elements include those elements in the B families.<br />These are the metals you are probably most familiar: copper, tin, zinc, iron, nickel, gold, and silver.<br />They are good conductors of heat and electricity.<br />
  10. 10. Halogen Family<br />The elements in this family are fluorine, chlorine, bromine, iodine, and astatine.<br />Halogens have 7 valence electrons, which explains why they are the most active non-metals. They are never found free in nature.<br />Halogen atoms only need to gain 1 electron to fill their outermost energy level.<br />They react with alkali metals to form salts.<br />
  11. 11. Noble Gases<br />Noble Gasesare colorless gases that are extremely un-reactive. <br />One important property of the noble gases is their inactivity. They are inactive because their outermost energy level is full. <br />Because they do not readily combine with other elements to form compounds, the noble gases are called inert.<br />The family of noble gases includes helium, neon, argon, krypton, xenon, and radon. <br />All the noble gases are found in small amounts in the earth&apos;s atmosphere. <br />
  12. 12. Rare Earth Elements<br />The thirty rare earth elements are composed of the lanthanide and actinide series.<br />One element of the lanthanide series and most of the elements in the actinide series are called trans-uranium, which means synthetic or man-made.<br />